package com.AICoupon.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.AICoupon.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1. 获取redis
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token))
            return true;
        //2.获取redis中的用户
        Map<Object, Object> usermap = stringRedisTemplate.opsForHash()
                .entries(RedisConstants.LOGIN_USER_KEY +token);

        if (usermap.isEmpty())
            return true;
        //5. 存在，保存用户信息到ThreadLocal
        UserDTO user = BeanUtil.fillBeanWithMap(usermap, new UserDTO(), false);
        UserHolder.saveUser( user);
        //刷新token有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        //6. 放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }
}
